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Grade 6 Science · Food Webs and Energy Flow

Grade 6 Food Webs and Energy Flow Practice Test

Build Grade 6 Science skills with five 10-question practice tests on food chains, food webs, trophic levels, energy pyramids, producers, consumers, decomposers, and energy transfer.

Food Webs and Energy Flow Practice Tests

These Grade 6 Science practice tests help students model how energy moves through ecosystems. Students practice reading food chains and food webs, identifying producers and consumers, comparing trophic levels, interpreting energy pyramids, explaining decomposer roles, and predicting how population changes affect connected organisms.

Skills covered

  • Reading arrows and relationships in food chains and food webs
  • Identifying producers, primary consumers, secondary consumers, and decomposers
  • Comparing trophic levels and energy pyramids
  • Explaining why energy decreases as it moves through a food web
  • Distinguishing energy flow from matter cycling
  • Using evidence to predict effects of population and environmental changes

How to use these practice tests

Start at the producer and follow each arrow toward the organism that receives energy. Identify the trophic level of each organism, then consider how limited energy and resources affect the number of organisms at higher levels. Remember that energy flows through an ecosystem while materials are recycled by decomposers.

For more Grade 6 Science practice, return to the Grade 6 Science category.

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Grade 6 Food Webs and Energy Flow Practice Tests

A 10-question Grade 6 Science practice test on food chains, food webs, trophic levels, energy pyramids, producers, consumers, decomposers, and energy transfer.

Trace energy through food chains and webs, identify trophic levels, compare energy and matter movement, and use evidence to explain ecosystem changes.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

Which organism receives energy directly from a producer in this chain: algae, insect, fish, heron?

Please select an answer first.

Correct answer: A

The correct answer is The insect.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: The insect is the first consumer and eats the algae directly.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

The insect is the first consumer and eats the algae directly.

2. QuestionMultiple choice

Which organism is the top consumer in this chain: grass, mouse, snake, hawk?

Please select an answer first.

Correct answer: B

The correct answer is The hawk.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: The hawk is the last consumer shown and receives energy after the other feeding transfers.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

The hawk is the last consumer shown and receives energy after the other feeding transfers.

3. QuestionMultiple choice

What does the phrase "grass to rabbit" represent in a food chain?

Please select an answer first.

Correct answer: C

The correct answer is A transfer of energy when the rabbit eats the grass.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: The relationship shows energy moving from the food to the organism that eats it.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

The relationship shows energy moving from the food to the organism that eats it.

4. QuestionMultiple choice

Which arrow direction correctly represents energy flow?

Please select an answer first.

Correct answer: D

The correct answer is Sun → plant → caterpillar → bird.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Energy enters from the Sun, is captured by plants, and moves to consumers.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Energy enters from the Sun, is captured by plants, and moves to consumers.

5. QuestionMultiple choice

Why do producers form the base of most food webs?

Please select an answer first.

Correct answer: A

The correct answer is They convert an outside energy source into food that supports consumers..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Producers make food and provide the initial biological energy for many food webs.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Producers make food and provide the initial biological energy for many food webs.

6. QuestionMultiple choice

Which relationship is shown when a caterpillar eats a leaf?

Please select an answer first.

Correct answer: B

The correct answer is A consumer obtains energy from a producer..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: The leaf is part of a producer, and the caterpillar is a primary consumer.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

The leaf is part of a producer, and the caterpillar is a primary consumer.

7. QuestionMultiple choice

What would happen to the energy available to owls if mice had fewer seeds to eat?

Please select an answer first.

Correct answer: C

The correct answer is Less energy would likely be available to owls because fewer mice could survive..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Less food for mice can reduce the energy transferred to predators that eat mice.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Less food for mice can reduce the energy transferred to predators that eat mice.

8. QuestionMultiple choice

Why are decomposers not usually shown as only one final step in a food web?

Please select an answer first.

Correct answer: D

The correct answer is They can obtain matter from many dead organisms at different trophic levels..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: Decomposers act on dead matter from many parts of the ecosystem.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

Decomposers act on dead matter from many parts of the ecosystem.

9. QuestionMultiple choice

Which model would best show feeding relationships in a pond?

Please select an answer first.

Correct answer: A

The correct answer is A food web with arrows connecting algae, insects, fish, frogs, birds, and decomposers.

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: A food web can represent the many connected feeding relationships in a pond.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

A food web can represent the many connected feeding relationships in a pond.

10. QuestionMultiple choice

What is the best way to interpret an arrow in a food web?

Please select an answer first.

Correct answer: B

The correct answer is Read it as energy moving from the organism eaten to the organism that eats it..

  1. Identify the feeding relationship: Find the organism that provides energy and the organism that receives it.
  2. Trace the flow: The standard arrow convention shows the direction of energy transfer.
  3. Check the ecosystem effect: Consider how a population change could affect the other organisms and energy available at each level.

The standard arrow convention shows the direction of energy transfer.

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Frequently asked questions about Grade 6 Food Webs and Energy Flow

What topics are covered?

The page covers food chains, food webs, arrows, producers, consumers, decomposers, trophic levels, energy pyramids, energy transfer, matter cycling, and population changes.

How should students read a food web?

Begin with a producer and follow each arrow toward the organism that receives energy. Then identify the feeding role and consider how a change could affect connected populations.

How many questions are on this page?

The page includes five mini tests with 10 questions each, for 50 Grade 6 Food Webs and Energy Flow questions in total.